.nav {
  display: flex;
  height: 50px;
  width: 50vw;
  line-height: 50px;
  background-color: #010309;
}
.nav .nav-item {
  flex: 1;
  color: #fff;
  text-align: center;
}
#app {
  display: flex;
  height: 50px;
  width: 50vw;
  line-height: 50px;
  background-color: #010309;
}
#app .nav-item {
  flex: 1;
  color: #fff;
  text-align: center;
}
